503212513 has 2 divisors, whose sum is σ = 503212514. Its totient is φ = 503212512.

The previous prime is 503212499. The next prime is 503212517. The reversal of 503212513 is 315212305.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 498494929 + 4717584 = 22327^2 + 2172^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-503212513 is a prime.

It is not a weakly prime, because it can be changed into another prime (503212517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251606256 + 251606257.

It is an arithmetic number, because the mean of its divisors is an integer number (251606257).

Almost surely, 2^503212513 is an apocalyptic number.

It is an amenable number.

503212513 is a deficient number, since it is larger than the sum of its proper divisors (1).

503212513 is an equidigital number, since it uses as much as digits as its factorization.

503212513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 503212513 is about 22432.3987348656. The cubic root of 503212513 is about 795.3967472376.

Adding to 503212513 its reverse (315212305), we get a palindrome (818424818).

The spelling of 503212513 in words is "five hundred three million, two hundred twelve thousand, five hundred thirteen".